Vulnerability CVE-2007-5640
Published: 2007-10-23   Modified: 2012-02-12

Description:
The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM), Mobile Voice Client, and other product lines, allow remote attackers to block calls and force re-registration via a resume message to the Signaling Server that has a spoofed source IP address for the phone. NOTE: the attack is more disruptive if a new spoofed resume message is sent after each re-registration.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Nortel IP Phone forced re-authentication
Daniel Stirniman...
23.10.2007

Type:

CWE-noinfo

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.1/10
6.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Nortel -> Business communications manager 
Nortel -> Centrex ip client manager 
Nortel -> Centrex ip element manager 
Nortel -> Meridian option 11c 
Nortel -> Meridian option 51c 
Nortel -> Meridian option 61c 
Nortel -> Meridian option 81c 
Nortel -> Meridian sl100 
Nortel -> Mobile voice client 2050 

 References:
http://securityreason.com/securityalert/3274
http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=654641
http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_forced_re-authentication_v1.0.txt
http://www.securityfocus.com/archive/1/482481/100/0/threaded
http://www.securityfocus.com/bid/26124
https://exchange.xforce.ibmcloud.com/vulnerabilities/37254
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